(+)-α-Methylbenzylamine (-)-2,2-Dimethylcyclopropanecarboxylate is an intermediate in the synthesis of (R,R)-Cilastatin (C441120), which is a derivative of Cilastatin (C441100), prevents renal metabolism of penem and carbapenem antibiotics by specific and reversible dehydropeptidase I inhibition. Antibacterial adjunct.